CVE-2026-64438: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel4.3 and later · before 5.10.261
• linux linux kernel5.11 and later · before 5.15.212
• linux linux kernel5.16 and later · before 6.1.178
• linux linux kernel6.2 and later · before 6.6.145
• linux linux kernel6.7 and later · before 6.12.97
• linux linux kernel6.13 and later · before 6.18.40
• linux linux kernel6.19 and later · before 7.1.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 4.3affected
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 218c2836b3987f3fa1d9eac505462cded0821e4caffected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 446b4d77599cf1a168573f7fb32a4a6aa4f09219affected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 5d916c1eae1933511a69bffe243b4ee5d7da399caffected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before f344a369d0380d54c8d6c8d24734a78dd5a89817affected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 51144032248cc4ea22917370565650670b8b4e9baffected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 49cd5ac6de8de39a14ead609bb552d372d5602cdaffected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 6e92b28cd74fa433658efeadf21b9d4b01023d7daffected · git
  • ed8ccaef52fa03fb03cff45b380f72c9f869f273 and later · before 277281c10c63791067d24d421f7c43a15faa9096affected · git
  • before 4.3not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now

Published before and after this one in the same product

• ← EarlierCVE-2026-64435Jul 25, 2026 · audit: Fix data races of skb_queue_len() readers on audit_queue
  32Monitor
• ← EarlierCVE-2026-64436Jul 25, 2026 · net: af_key: initialize alg_key_len for IPComp states
  28Monitor
• Later →CVE-2026-64439Jul 25, 2026 · crypto: krb5 - filter out async aead implementations at alloc
  39Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.